Excitation control apparatus for a generator

H - Electricity – 02 – P

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H02P 9/14 (2006.01) H02P 9/10 (2006.01) H02P 9/30 (2006.01)

Patent

CA 1105558

39/11 EXCITATION CONTROL APPARATUS FOR A GENERATOR ABSTRACT OF THE DISCLOSURE A field control apparatus for a generator having a field winding comprises a terminal voltage control unit for controlling a field current of the generator in accordance with a difference between a terminal voltage signal of the generator and a reference voltage signal, which control unit has at least one of a line drop compensation function, an under-excitation limitation function, an over-excitation limitation function, a power factor regulation function, an armature winding over-current compensation function and a cross-current compensation function. The field control apparatus includes a detector as a common signal source for detecting active power and reactive power components at an output terminal of the generator and means responsive to the output of the detector for performing scalar operation in accordance with a function of the added compensation/control function described above. An output of the operating means is added to the differential signal as an added function signal to control the field current for excitation of the field winding.

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